-
TM 5-4310-451-14
TECHNICAL MANUALOPERATOR’S, UNIT, DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUALFOR
COMPRESSOR, AIR: ROTARY SCREW, 750 CFM,100 PSI , WHEEL-MOUNTED,
DED
SULLAIR MODEL 750 DP(NSN 4310-01-053-3891 )
This manual and TM 5-4310-451-24P supersede TM
5-4310-451-14&P,dated 14 December 1979, and all changes.
Approved for public release; distribution Is unlimited.
HEADQUARTERS, DEPARTMENT OF THE ARMY
MAY 1993
OperatingInstructions 2-1
Operator/CrewTroubleshootingProcedures 3-7
Operator/CrewPMCS 2-7
LubricationInstructions 3-1
Unit PMCS 4-3
MaintenanceAllocation Chart(MAC) B-1
UnitTroubleshootingProcedures 4-7
DS/GSTroubleshootingProcedures 5-1
-
TM 5-4310-451-14
FOR INFORMATION ON FIRST AID, REFER TO FM 21-11.
WARNING
CARBON MONOXIDE EXHAUST GASES CAN KILL!Carbon monoxide is
colorless, odorless, deadly poisonous gas, which, when breathed,
deprives the body of oxygen andcauses suffocation. Exposure to air
containing carbon monoxide produces symptoms of headache,
dizziness, loss ofmuscular control, apparent drowsiness, and coma.
Permanent brain damage or death can result from severe
exposure.
Carbon monoxide occurs in exhaust fumes of internal combustion
engines. Carbon monoxide can become dangerouslyconcentrated under
conditions of inadequate ventilation. The following precautions
must be observed to ensure safety ofpersonnel when engine is
operated for any purpose.
(1) DO NOT operate engine in enclosed areas.(2) DO NOT idle
engine without ventilator blower operating.(3) BE ALERT at all
times for exhaust odors.(4) BE ALERT for exhaust poisoning
symptoms. They are:
• Headache• Dizziness• Sleepiness• Loss of muscular control
(5) If you see another person with exhaust poisoning symptoms:•
Remove person from area• Expose to fresh air• Keep person warm• DO
NOT permit physical exercise• Administer artificial respiration, if
necessary• Notify a medic
(6) BE AWARE: The field protective mask for
chemical-biological-radiological (CBR) protection will not protect
youfrom carbon monoxide poisoning.
The Best Defense Against Carbon Monoxide Poisoning Is Good
Ventilation.
a
-
TM 5-4310-451-14
WARNING
ASBESTOS HAZARDDO NOT handle brakeshoes, brakedrums, or other
brake components unless area has been properly cleaned. There maybe
asbestos dust on these components which can be dangerous if you
touch it or breathe it. Wear an approved filtermask and gloves.
Never use compressed air or a dry brush to clean brake components.
Dust may be removed using anindustrial-type vacuum cleaner. Clean
dust or mud away from brake components with water and a wet, soft
brush or cloth.Failure to follow this warning may result in serious
illness or death to personnel.
WARNING
COMPRESSED AIRCompressed air used for cleaning or drying
purposes, or for clearing restrictions, should never exceed 30 psi
(207 kPa).Wear protective clothing (goggles/shield, gloves, etc.)
and use caution to avoid injury to personnel.
WARNING
DRY CLEANING SOLVENTDry cleaning solvent, P-D-680, is toxic and
flammable. Always wear protective goggles and gloves, and use only
in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flameor
excessive heat. The solvent's flash point is 100°F-138°F
(380C-59°C). If you become dizzy while using cleaningsolvent,
immediately get fresh air and medical help. If solvent contacts
eyes, Immediately wash your eyes and get medicalaid.
WARNING
LIVE STEAM Avoid contact with live steam. Live seam can bum
skin, cause blindness, and cause other serious injury. Be sure to
wearprotective apron, gloves, and safety goggles when using live
steam.
WARNING
STORAGE BATTERIES
• Remove all jewelry such as dog tags, rings, bracelets, etc. If
jewelry or disconnected battery ground cablebattery terminal, a
direct short will result, causing serious injury or death to
personnel.
• Battery acid (electrolyte) is extremely dangerous. Always wear
goggles and rubber gloves when performingchecks or inspections.
Serious injury to personnel will result if battery acid contacts
skin or eyes.
• DO NOT perform battery system checks or inspections while
smoking or near fire, flames, or sparks. Batteriesmay explode,
causing serious injury or death to personnel.
b
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TM 5-4310-451-14
WARNING
NBC EXPOSURE
If NBC exposure is suspected, all engine air cleaner air filter
media should be handled by personnel wearing protectiveequipment.
Consult your NBC Officer or NBC NCO for appropriate handling or
disposal procedures. Failure to follow thiswarning may result in
serious injury or death to personnel.
To order this NBC decal use:National Stock Number (NSN) -
7690-01-114-3702Part Number (PN) - 12296626Commercial and
Government Entity Code (CAGEC) - 19207
WARNING
NOISE
Always wear ear plugs or other types of hearing protection while
engine is running. Damage to hearing will occur
withoutprotection.
WARNING
SPRAY GUN
Never aim the spray gun at any person or part of the body.
Pressure is strong enough to puncture skin and cause seriousinjury
to personnel.
c/(d Blank)
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*TM 5-4310-451-14
TECHNICAL MANUAL HEADQUARTERSTM 5 431W-451-14 DEPARTMENT OF THE
ARMY
Washington D.C., 3 May 1993
OPERATOR’S, UNIT, DIRECT SUPPORT, ANDGENERAL SUPPORT MAINTENANCE
MANUAL
FORCOMPRESSOR, AIR: ROTARY SCREW, 750 CFM,
100 PSI, WHEEL-MOUNTED, DEDSULLAIR MODEL 750 DP(NSN
4310-01-053-3891)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTSYou can help
improve this manual. If you find any mistakes or if you know of a
way to improve theprocedures, please let us know. Mail your letter,
DA Form 2028 (Recommended Changes to Publicationsand Blank Forms),
or DA Form 2028-2, located in the back of this manual, direct to:
Commander, U.S.Army Tank-Automotive Command, ATTN: AMSTA-MB,
Warren, MI 48397-5000. A reply will be furnishedto you.
TABLE OF CONTENTSPage
How to Use This
Manual....................................................................................
vCHAPTER 1 INTRODUCTIONSection I. General Information
...........................................................................................
1-1Section II. Equipment Description and Data
.......................................................................
1-2Section III. Technical Principles of Operation
......................................................................
1-12
CHAPTER 2 OPERATING INSTRUCTIONSSection I. Description and Use
of Operator’s Controls and
Indicators............................... 2-1Section II.
Operator/Crew Preventive Maintenance Checks and
Services (PMCS)
..............................................................................................
2-7Section III. Operation Under Usual Conditions
....................................................................
2-13Section IV. Operation Under Unusual Conditions
................................................................
2-20
* This manual and TM 5-4310-451-24P supersede TM
9-4310-451-14&P, dated 14 December 1979, and all
changes.Approved for public release; distribution is unlimited.
-
TM 5-4310-451-14
TABLE OF CONTENTS (Con’t)
Page
CHAPTER 3 OPERATOR MAINTENANCESection I. Lubrication
Instructions..................................................................................
3-1Section II. Operator/Crew Troubleshooting Procedures
............................................... 3-7Section III.
Maintenance
Procedures...................................................................................
3-14CHAPTER 4 UNIT MAINTENANCESection I. Repair Parts; Special
Tools; Test, Measurement
and Diagnostic Equipment (TMDE); and Support Equipment
........................... 4-1Section II. Service Upon Receipt
........................................................................................
4-2Section III. Unit Preventive Maintenance Checks and Services
(PMCS) ............................ 4-3Section IV. Unit
Troubleshooting Procedures I
....................................................................
4-7Section V. General Maintenance Instructions
.....................................................................
4-17Section VI. Engine Component Maintenance
......................................................................
4-23Section VII. Engine Lubrication System
Maintenance...........................................................
4-27Section VIII. Engine Fuel System Maintenance
.....................................................................
4-39Section IX. Exhaust System Maintenance
...........................................................................
4-75Section X. Cooling System Maintenance
............................................................................
4-83Section XI. Electrical System
Maintenance..........................................................................
4-111Section XII. Axle Maintenance
..............................................................................................
4-137Section XIII. Brake System
Maintenance...............................................................................
4-143Section XIV. Wheels and Brake drums
Maintenance.............................................................
4-155Section XV. Steering System
Maintenance...........................................................................
4-169Section XVI. Frame and Towing Attachments Maintenance
.................................................. 4-179Section
XVII. Suspension
Maintenance...................................................................................
4-181Section XVIII. Nonelectrical Gages
Maintenance.....................................................................
4-185Section XIX. Body Maintenance
.............................................................................................
4-195Section XX. Air Compressor Assembly
Maintenance............................................................
4-203Section XXI. Painting and Identification Marking
....................................................................
4-255Section XXII. Preparation for Storage or Shipment
.................................................................
4-257CHAPTER 5 DIRECT SUPPORT AND GENERAL SUPPORT
MAINTENANCESection I. Direct Support and General Support
Troubleshooting Procedures I ................ 5-1Section II.
General Engine Maintenance
Instructions.........................................................
5-5Section III. Engine Maintenance
..........................................................................................
5-11Section IV. Engine Fuel System Maintenance
.....................................................................
5-181Section V. Cooling System Maintenance
............................................................................
5-275
ii
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TM 5-4310-451-14
TABLE OF CONTENTS (Con’t)
Page
Section VI. Electrical System
Maintenance..........................................................................
5-285Section VII. Brakedrum and Tire Maintenance
.....................................................................
5-333Section VIII. Frame
Maintenance...........................................................................................
5-337Section IX. Body Maintenance
.............................................................................................
5-339Section X. Air Compressor Assembly
Maintenance............................................................
5-373APPENDIX A REFERENCES
..................................................................................................
A-1
APPENDIX B MAINTENANCE ALLOCATION CHART
.......................................................... B-1
APPENDIX C COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS
................. C-1APPENDIX D ADDITIONAL AUTHORIZATION LIST
..............................................................
D-1APPENDIX E EXPENDABLE/DURABLE SUPPLIES AND MATERIALS
LIST........................ E-1APPENDIX F ILLUSTRATED LIST OF
MANUFACTURED ITEMS ........................................
F-1APPENDIX G TORQUE
LIMITS...............................................................................................
G-1
INDEX................................................................................................................
Index-1iii/(iv Blank)
-
TM 5-4310-451-14
HOW TO USE THIS MANUALThis manual is designed to help maintain
the Sullair Model 750 DP, 750 CFM Air Compressor Unit. It describes
in detailthe Operator/Crew, Unit, Direct Support, and General
Support Maintenance prescribed by the Maintenance AllocationChart
(see Appendix B) and the Source, Maintenance, and Recoverability
(SMR) Codes (see TM 5-4310-451-24P).
FEATURES OF THIS MANUAL:• Bleed-to-edge indicators on the cover
and on the edge of the applicable manual pages provide quick access
to
chapter and sections most often used.• A table of contents Is
provided for all chapters, sections, and appendices.• WARNINGs,
CAUTIONs, and NOTEs, subject headings, and other important
information are highlighted in bold
print as a visual aid.• Statements and words of particular
importance are printed in capital letters to create emphasis.•
Instructions are located together with illustrations that show the
specific task on which the maintainer is working.• Equipment
locator illustrations are provided throughout the maintenance
procedures. These illustrations are for
use in locating components and assemblies of the overall
equipment. It should be noted that the locatorillustrations do not
always reflect the equipment condition listed in the initial setup
at the beginning of each task.
• An alphabetical index is provided at the end of the manual to
assist in locating information not readily found in thetable of
contents.
• Technical instructions Include metric In addition to standard
units. A metric conversion chart is provided on theInside back
cover.
• A standard torque chart is provided at Appendix G.
FOLLOW THESE GUIDELINES WHEN YOU USE THE MANUAL:• The maintainer
should read through this manual and become familiar with its
contents before proceeding to
specific maintenance tasks.• A warning summary is provided at
the beginning of this manual and should be read before performing
any
maintenance tasks.• In the actual maintenance tasks, follow all
WARNINGs, CAUTION s, and NOTEs. These are given immediately
preceding the procedural steps to which they apply. If these
instructions are not followed or care is not taken,Injury to
personnel or equipment damage may result.
• Within a chapter, section, or paragraph, headings are used to
help group the material and assist in quickly findingtasks. Read
all preliminary information found at the beginning of each task.
After completing a task, ALWAYSperform the follow-on maintenance at
the end of the task.
• A subject index is located at the beginning of each section to
help you find the exact paragraph you need.
v/(vi Blank)
-
TM 5-4310-451-14
CHAPTER 1INTRODUCTION
Section I. GENERAL INFORMATION
Paragraph PageNumber Paragraph Title Number
1-1 Scope
.......................................................................................................................
1-11-2 Maintenance Forms, Records, and Reports
............................................................ 1-11-3
Destruction of Army Materiel To Prevent Enemy
Use.............................................. 1-11-4
Preparation for Storage or
Shipment........................................................................
1-11-5 Reporting Equipment Improvement Recommendations (EIRs)
............................... 1-1
1-1. SCOPE.This manual describes the operation and Unit, Direct
Support, and General Support Maintenance for the 750 CFM
Air Compressor Unit.
1-2. MAINTENANCE FORMS, RECORDS, AND REPORTS.Department of the
Army forms and procedures used for equipment maintenance will be
those prescribed by DA
Form 738-750, The Army Maintenance Management System
(TAMMS).
1-3. DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE.For
destruction of Army materiel to prevent enemy use, refer to TM
750-244-3.
1-4. PREPARATION FOR STORAGE OR SHIPMENT.For information on
preparing the 750 CFM Air Compressor Unit for storage or shipment,
refer to Chapter 4,
Section XXII.
1-5. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIRs).If
your air compressor unit needs improvement, let us know. Send us an
EIR. You, the user, are the only
one who can tell us what you don’t like about your equipment.
Let us know why you don’t like the design. Put it on an SFForm 368
(Product Quality Deficiency Report). Mail it to us at: Commander,
U.S. Army Tank-Automotive Command,ATTN: AMSTA-MP, Warren, Ml
48397-5000. We will send you a reply.
1-1
-
TM 5-4310-451-14
Section II. EQUIPMENT DESCRIPTION AND DATA
Paragraph PageNumber Paragraph Title Number1-6 Equipment
Characteristics, Capabilities, and Features
........................................... 1-21-7 Location and
Description of Major Components
...................................................... 1-31-8
Location and Contents of Data
Plates......................................................................
1-51-9 Location and Contents of Stencil
Markings..............................................................
1-71-10 Location and Contents of Decals
.............................................................................
1-81-11 Equipment Data
.......................................................................................................
1-10
1-6. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES.a.
The 750 CFM Air Compressor Unit Is designed to operate rock
drilling equipment and pneumatic tool outfits In
engineering construction units.b. The air compressor unit is
equipped with:
(1) Sound deadening Insulation to reduce noise emission. Hearing
protection Is still required.(2) Emergency stop control which
allows operator to quickly shut down air compressor In case of
emergency.(3) An ether starting aid kit used to assist in engine
starting.(4) Cold start valve provided for cold weather
starting.(5) Manually operated handbrake lever used to secure the
air compressor unit when stopped or parked.(6) An Industrial engine
designed to provide enough horsepower for more than adequate
reserve at rated
conditions.(7) A 24-volt electrical system.(8) Leaf spring
suspension to absorb road shock.
1-2
-
TM 5-4310-451-14
1-7. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
Key Component Description
1 Control Panel Provides the necessary controls to safely
operate and monitor theengine and air compressor assembly.
2 Safety Chains Hook to towing vehicle to prevent the air
compressor unit from fullybreaking away.
3 Leaf Spring Component of suspension system which serves to
cushion roadshock; located at each wheel.
4 Handbrake Lever Activates handbrake when air compressor unit
is stopped or parked.
TA704670
1-3
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TM 5-4310-451-14
1-7. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (Con’t).
Key Component Description
5 Engine Provides power to drive the air compressor.6 Lifting
Bail Allows for lifting of air compressor unit.7 Air Compressor
Engine-driven to compress air to 750 cfm (354 I/sec).
TA704671
1-4
-
TM 5-4310-451-14
1-8. LOCATION AND CONTENTS OF DATA PLATES.
The following illustrations show the location and contents of
all air compressor unit data plates.
1-5
-
TM 5-4310-451-14
1-8. LOCATION AND CONTENTS OF DATA PLATES (Con’t).
1-6
-
TM 5-4310-451-14
1-8. LOCATION AND CONTENTS OF DATA PLATES (Con’t).
1-9. LOCATION AND CONTENTS OF STENCIL MARKINGS.
1-7
-
TM 5-4310-451-14
1-10. LOCATION AND CONTENTS OF DECALS.
The following illustrations show the location and contents of
all air compressor unit decals.
1-8
-
TM 5-4310-451-14
1-10. LOCATION AND CONTENTS OF DECALS (Con’t).
1-9
-
TM 5-4310-451-14
1-10. LOCATION AND CONTENTS OF DECALS (Con’t).
1-11. EQUIPMENT DATA.
General
Height (Over Mufflers)
.......................................................................................
109.5 in. (278.1
cm)Width..................................................................................................................
90.0 in. (228.6 cm)Length (Including
Drawbar)................................................................................
181.5 in. (461.0 cm)Wheel Base Width
.............................................................................................
68.0 in. (172.7
cm)Weight:Dry......................................................................................................................
10,730 lb (4871 kg)Gross
.................................................................................................................
11,000 lb (4994 kg)Electrical
System:Voltage...............................................................................................................
24
voltsBattery................................................................................................................
Amp/Hr @ 20 Hr Rate
TA704677
1-10
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TM 5-4310-451-14
1-11. EQUIPMENT DATA (Con’t).
Electrical System (Con’t):Alternator
...........................................................................................................
65
ampWheels:Quantity..............................................................................................................
4Rim
Size.............................................................................................................
16 X 5.50Number of Stud Holes
.......................................................................................
6Wheel Bolt Torque
.............................................................................................
80-90 lb.-ft.(108-122
N.m)Tires:Quantity..............................................................................................................
4Size
....................................................................................................................
7.50 X 16LT Load Range DInflation
..............................................................................................................
45 ps (310 kPa)
Air Compressor Assembly.
Manufacturer......................................................................................................
Sullair CorporationModel
.................................................................................................................
750 DPType
...................................................................................................................
Rotary Screw, Oil FloodLubricationOutput
................................................................................................................
750 cfm (354 I/sec)Rated Operating Pressure
.................................................................................
100 psi (690 kPa)Maximum Operating Pressure
...........................................................................
125 psi (862 kPa)Operating Tilt (MAX)
..........................................................................................
15°Stage..................................................................................................................
SingleCooling
System..................................................................................................
Pressurized OilOil Separator
Capacity.......................................................................................
30.0 gal. (113.6 1)
Engine
Manufacturer......................................................................................................
Detroit DieselModel
.................................................................................................................
6V-71Type
...................................................................................................................
Diesel, Liquid-cooledRated rpm
..........................................................................................................
2100 rpmIdle
rpm..............................................................................................................
1050 rpmHorsepower @ 850F (29 C)/500 ft (153 m) Alt
.................................................. 228 hp (170
Kw)Number of Cylinders
..........................................................................................
6Number of Main Bearings
..................................................................................
4Number of Cycles
..............................................................................................
2Bore
...................................................................................................................
4.25 in. (10.80
cm)Stroke.................................................................................................................
5.0 in. (12.7 cm)Total Displacement
............................................................................................
426 cu in. (6.98 1)Compression Ratio
............................................................................................
18.7 to 1Lubrication System
............................................................................................
Full Pressure OilCrankcase
Capacity...........................................................................................
6.5 gal. (24.6 1)Fan Belt
Tension................................................................................................
60-80 lb (27-36 kg)Alternator Belt Tension
......................................................................................
50-70 lb (23-32 kg)Radiator
Capacity...............................................................................................
17.0 gal. (64.3 1)Fuel Tank Capacity
............................................................................................
110.0 gal. (416.4 1)
1-11
-
TM 5-4310-451-14
Section III. TECHNICAL PRINCIPLES OF OPERATION
Paragraph PageNumber Paragraph Title Number
1-12
General.....................................................................................................................
1-121-13 Engine
......................................................................................................................
1-131-14 Air Compressor
Assembly........................................................................................
1-13
1-12. GENERAL.
a. The air compressor is driven by a liquid-cooled diesel
engine.b. The engine (1) and air compressor assembly (2) are
constructed as an integral unit; the air compressor is
direct-driven from the engine. The engine and air compressor are
enclosed in a housing and carried on a commontrailer.
c. The air compressor unit must be level to the ground within
15° when operating at a work site.
1-12
-
TM 5-4310-451-14
1-13. ENGINE.
The engine for this air compressor unit is a Detroit Diesel,
six-cylinder, two-cycle engine. For information onengine technical
principles of operation, refer to TM 9-8000.
1-14. AIR COMPRESSOR ASSEMBLYa. General.
(1) The air compressor assembly is a single stage,positive
displacement, flood lubricated type whichprovides continuous
pulse-free compression.
(2) Oil is injected into the air compressor and mixesdirectly
with the air as the rotors turn, compressing theair.
(3) The oil flow has three primary functions:(a) As a coolant,
it controls the rise of air
temperature normally associated with theheat of compression.
(b) Seals the leakage paths between therotors and stator, and
also between therotors them- selves.
TYPICAL CROSS-SECTION
(c) Acts as a lubricating film between the rotors, allowing one
rotor to directly drive the other, which acts as anidler.
(4) After the air/oil mixture is discharged from the air
compressor, the oil is separated from the air. At this time, the
airflows to the service line and the oil is cooled in preparation
for reinjection.
TA704679
1-13
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TM 5-4310-451-14
1-14. AIR COMPRESSOR ASSEMBLY (Con’t).
b. Cooling and Lubricating System.(1) The air compressor cooling
and lubrication system is designed to provide adequate lubrication
as
will as maintain the proper operating temperature of the
unit.(2) The cooling and lubrication system consists of a main oil
filter (6), a thermal valve (3), bearing oil filter (8), and
oilstop valve (7), in addition to an oil cooler (4) and fan
(5).
(3) Oil is used in the system as a coolant and lubricant. Oil is
housed in the oil separator (1). Upon startup ofthe air compressor
assembly, the temperature of the oil is cool and routing to the oil
cooler (4) is not necessary. The oil,taking the path of least
resistance, flows to the thermal valve (3).
(4) The thermal valve (3) has two entrance ports, A and B, and
one exit port. Port A accepts oil from the oilseparator (1) and
Port B accepts oil from the oil cooler (4).
(5) The oil first enters the thermal valve (3) and then flows on
to the air compressor (2), bypassing the oilcooler (4) As the air
compressor assembly continues to operate, the temperature of the
oil rises and Port A of the thermalvalve begins to close. The
closing of Port A forces a portion of the oil through the oil
cooler. The oil cooler is a radiator-type cooler that works In
conjunction with fan (5). The fan forces air through the
radiator-tube oil cooler reducing thetemperature of the oil. From
the oil cooler, the oil is routed back to the thermal valve,
entering at Port B.Before the temperature of the oil becomes high
enough to completely close Port A, cooled oil entering at Port B is
missedwith warmer oil entering at Port A. When the temperature of
the oil reaches 1400F (60 C), Port A is completely closed,causing
all oil to flow to the oil cooler.
1-14
-
TM 5-4310-451-14
1-14. AIR COMPRESSOR ASSEMBLY (Con’t).
(6) After the oil passes through the thermal valve (3), it is
directed through the main oil filter (6) where it isfiltered. The
filter has a replaceable filter element and a built-in bypass
valve. The bypass valve allows the oil to flow evenwhen the filter
element becomes plugged and requires changing or when viscosity of
the oil is too high for adequate flow.
(7) After the oil is properly filtered, it flows through the oil
stop valve (7). The oil stop valve functions onshutdown when it
shuts off the oil supply to the air compressor (2). The oil stop
valve is held open by a pressure signalfrom the air compressor. At
shutdown the pressure signal is lost and the oil stop valve closes,
isolating the air compressorfrom the cooling system.
(8) A portion of the oil flowing to the air compressor (2) is
routed to a bearing oil filter (8). All oil flowing to thegears,
shaft seal, and internal bearings of the air compressor flows
through this extra-fine filter ensuring the cleanestpossible oil
for these components. This filter also has a built-in bypass valve
and a replaceable filter element.
c. Discharge System.
(1) The air compressor (2), which uses aseparate oil system from
the engine (9), discharges acompressed air/oil mixture through a
compressor dis-charge check valve (11) into the oil separator (1).
Thedis- charge check valve prevents discharged air fromreturning to
the compression chamber after shutdown.
(2) From the compressor discharge checkvalve (11), the air/oil
mixture Is directed to the oilseparator (1). The oil separator has
three functions:
(a) Acts as a primary oil separator.(b) Serves as the air
compressor oil separator.(c) Houses the final oil separator.
(3) The compressed air/oil mixture enters the oil separator (1)
and is directed against the side wall. By changeof direction and
reduction of velocity, large droplets of oil fall to the bottom of
the oil separator. The small percent of oilremaining in the
compressed air collects on the surface of the final separator
element as the compressed airflows throughthe separator. As more
and more oil collects on the element surface, the oil descends to
the bottom of the oil separator.A return line (or scavenge tube)
leads from the bottom of the final separator element of the inlet
region of the aircompressor (2). Oil collecting on the bottom of
the final separator element is returned to the air compressor by
thepressure difference between the area surrounding the final
separator element and the air compressor inlet. An
opening,protected by a strainer, is included in this return line to
ensure proper flow.
(4) The oil separator (1) is rated at 150 psi (1034 kPa) working
pressure. A minimum pressure valve (10),located downstream from the
oil separator, ensures a minimum receiver pressure of 40 psi (276
kPa) during all conditions.This pressure is necessary for proper
air/oil separation and proper oil circulation.
(5) A check valve at the outlet of the receiver is installed to
prevent compressed air in the service line frombleeding back into
the receiver on shutdown when the air compressor unit is being run
In parallel with other air compressorunits tied to large air
system. The check valve is also necessary when the air compressor
unit is functioning with apressure pot sandblasting operation.
TA704681
1-15
-
TM 5-4310-451-14
1-14. AIR COMPRESSOR ASSEMBLY (Con’t).(6) A safety relief valve,
located within the separator
discharge check valve (12), is set to open if the oilseparator
(1) pressure exceeds 140 psi (965 kPa). Atemperature switch will
shut down the air compressorunit if the discharge temperature
reaches 240°F(116°0C).
(7) Oil is added to the oil separator (1) through acapped oil
filler. An oil level gage enables the operatorto visually monitor
the oil separator oil level.
d. Control System. The purpose of the control system is to
regulate the amount of air intake In accordance with theamount of
compressed air being used. The control system consists of a
sullicon control (13), pressure regulating valve(16), blowdown
valve (17), and link rods which connect the sullicon control to the
inlet valve (14) and engine (9) governor.
(1) During startup the pressure regulating valve (16) and the
sullicon control (13) are Inoperative. When the aircompressor unit
is started, the oil separator (1) pressure will quickly rise from 0
to 40 psi (0 to 276 kPa). The spring on thesulllcon control holds
the butterfly valve fully open and the air compressor assembly
operates at full rated capacity. As theair compressor assembly
operates at full capacity, the engine (9) runs at full speed. The
rising oil separator pressure isIsolated from the service line by
the minimum pressure valve (10) which is set at approximately 40
psi (276 kPa).
(2) When the oil separator (1) pressure rises above 40 psi (276
kPa), the minimum pressure valve (10) opens anddelivers compressed
air to the service line. The sullicon control (13) remains
inoperative, holding the inletvalve (14) fully open for maximum air
output. The engine (9) will continue to run at full speed.
1-16
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TM 5-4310-451-14
1-14. AIR COMPRESSOR ASSEMBLY (Con’t).(3) If less than the rated
capacity of air is required, the service line pressure will rise
above 100 psi (690 kPa). The
pressure regulating valve (16) gradually opens, applying
pressure to the diaphragms on the sullicon control (13). Thiscauses
the sullicon control to partially close the inlet valve (14) and
reduce the speed of the engine (9). As the pressureincreases, the
sullicon control will further close the inlet valve and continue
reducing the engine speed until it reachesloaded speed. The
sullicon control has an opening (15) in its cover which vents a
small amount of air to the atmospherewhen the pressure regulating
valve is open. This allows the sullicon control to vary air output
matching air demand. Theopening also bleeds any accumulated
moisture from the sullicon control. The air compressor assembly
will continue to runin this manner until air demand increases. As
air demand increases, pressure in the oil separator (1) will fall
below 100 psi(690 kPa). The pressure regulating valve will close,
the inlet valve will be fully open, and the engine will once again
run atfull speed.
(4) The blowdown valve (17) is held closed by a pressure signal
from the air compressor (2). Upon shutdown, thepressure signal is
lost and the blowdown valve opens venting oil separator pressure to
the atmosphere.
e. Air Inlet System.(1) The air inlet system consists of two air
cleaners
(19) and restriction indicators (18), an air inlet valve
(14),and interconnecting piping to the engine (9) and aircompressor
assembly.
(2) The air inlet valve (14) controls the amount of airintake to
the air compressor (2) in response to theoperation of the sullicon
control (see subpara graph d).
(3) The air cleaners (19) are three-stage dryelement type
filters. These filters are capable of cleaningextremely dirty air;
however, in such cases morefrequent checks of the restriction
Indicators (18) will berequired. The restriction indicator will be
red when re-striction of air passing through the air cleaner
becomestoo high.
f. Instrument Panel Group. The instrument panel group consists
of a panel containing an engine coolanttemperature gage, engine oil
pressure gage, air pressure gage, air compressor discharge
temperature gage, ammeter,tach/hourmeter, ON/OFF engine switch,
engine start button, override button, emergency stop control which
is located onthe outside just below the instrument panel window, a
cold start valve, fuse, and ether starting aid kit.
g. Electrical System.
(1) Refer to the wiring diagram in paragraph 4-61 for the
location of major components of the electrical system.(2) The
electrical system is comprised of not only the necessary equipment
required to operate the air compressor
unit, but also a system to shut down the air compressor unit in
the event of a malfunction.(3) The components of the electrical
system are:(a) Engine starter with an integral solenoid.(b) Two
batteries.
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TM 5-4310-451-14
1-14. AIR COMPRESSOR ASSEMBLY (Con’t).
(c) Alternator with built-in voltage regulator.(d) Governor
control solenoid.(e) Air compressor discharge temperature switch
which will shut down the air compressor if air compressor
temperature exceeds 240°F (116°C).(f) Engine coolant temperature
switch set to shut down air compressor unit when coolant
temperature exceeds
2100F (990C).(g) Engine oil pressure switch provided to shut
down air compressor unit when engine oil pressure becomes
insufficient. When starting the air compressor unit, it is
necessary to override or bypass the engine oilpressure switch by
pressing the override button on the instrument panel until oil
pressure throughout thesystem Is high enough to close the switch
and complete the circuit to the governor control solenoid.
1-18
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TM 5-4310-451-14
CHAPTER 2OPERATING INSTRUCTIONS
Section I. DESCRIPTION AND USE OF OPERATOR’SCONTROLS AND
INDICATORS
Paragraph PageNumber Paragraph Title Number
2-1 General
.....................................................................................................................................................................
2-12-2 Controls and Indicators
..........................................................................................................................................
2-1
2-1. GENERAL.
This section shows the location and function of all air
compressor unit controls and indicators. Review thissection
thoroughly before operating the air compressor unit.
2-2. CONTROLS AND INDICATORS.
Key Control or Indicator Function
1 Emergency Stop Control Shuts down air compressor in case of
emergency. Air compressorimmediately shuts down when control is
pulled.
2 Handbrake Lever Activates handbrake when air compressor unit
is stopped or parked.
TA704684
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TM 5-4310-451-14
2-2. CONTROLS AND INDICATORS (Con’t).
Key Control or Indicator Function
3 Engine Coolant Indicates engine coolant temperature. Normal
reading is 160°F-Temperature Gage 180°F (71 °C-82°C).
4 Engine Oil Pressure Indicates engine oil pressure. Normal
reading is 40-60 psi (276-Gage 414 kPa) at 1050 rpm.
5 Ammeter Indicates if alternator function is normal. Needle
should indicate onthe "charge" side of zero (0) while air
compressor unit is running.
6 Air Pressure Gage Indicates air pressure inside oil
separator.7 Discharge Temperature Indicates temperature of air/oil
mixture leaving the air compressor.
Gage Normal reading is 180°F (82°C).8 Engine Start Button
Engages engine starter to turn and start engine.
TA704685
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TM 5-4310-451-14
2-2. CONTROLS AND INDICATORS (Con’t).
Key Control or Indicator Function
9 Cold Start Valve Allows engine to run at unload speed (low
pressure) until properlywarmed up. Used for cold weather
starting.
10 Engine Override Button Bypasses oil pressure switch when
starting engine.
11 Master Battery Switch Provides power for instrument panel
when in ON position.
12 ON/OFF Engine Switch Energizes electrical system when in ON
position.
13 Tach/Hourmeter Tachometer portion indicates engine
revolutions per minute (rpm).Hourmeter portion indicates and
records total number of hours ofactual operation.
Key Control or Indicator Function
14 Air Compressor Oil Indicates air compressor oil level. Oil
level must be present in sightSight Gage gage before operating air
compressor unit.
15 Engine Oil Dipstick Indicates level of oil in engine
crankcase.
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TM 5-4310-451-14
2-2. CONTROLS AND INDICATORS (Con’t).
Key Control or Indicator Function
16 Fuel Gage Indicates level of diesel fuel in fuel tank.
Key Control or Indicator Function
17 Air Cleaner Restriction Indicates air restriction in air
cleaners. One Indicator located on eachIndicators of two air
cleaners.
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TM 5-4310-451-14
2-2. CONTROLS AND INDICATORS (Con’t).
Key Control or Indicator Function
18 Air Compressor Oil Indicates how much oil is In oil
separator.Level Gage
Key Control or Indicator Function
19 Coolant Overflow Tank Indicates level of coolant in
radiator.
TA704688
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TM 5-4310-451-14
2-2. CONTROLS AND INDICATORS (Con’t).
Key Control or Indicator Function
20 Pressure Regulating Valve Opens pressure line between oil
separator and sullicon controlallowing sullicon control to regulate
air delivery according to airdemand. Adjustment range is 100-125
psi (690-861 kPa).
TA704689
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TM 5-4310-451-14
Section II. OPERATOR/CREW PREVENTIVE MAINTENANCE
CHECKS AND SERVICES (PMCS)
Paragraph PageNumber Paragraph Title Number
2-3 General
.........................................................................................................................................................
2-72-4 Service Intervals
...........................................................................................................................................
2-72-5 Reporting Repairs
.........................................................................................................................................
2-72-6 General PMCS Procedures
..........................................................................................................................
2-72-7 Specific PMCS Procedures
..........................................................................................................................
2-82-8 Leakage Definitions
......................................................................................................................................
2-8Table 2-1 Operator/Crew Preventive Maintenance Checks and
Services
(PMCS)......................................................
2-9
2-3. GENERAL.
a. To ensure that the air compressor unit is ready for operation
at all times, it must be inspected on a regularbasis so that
defects may be found before they result in serious damage,
equipment failure, or injury to personnel. Thissection contains
systematic Instructions on Inspections, adjustments, and
corrections to be performed by theoperator/crew.
b. While performing PMCS, read and follow all safety
instructions found in the Warning Summary at the frontof this
manual. Keep In mind all WARNINGs and CAUTIONs.
2-4. SERVICE INTERVALS.
Perform PMCS, found in Table 2-1, at the following
intervals:
(1) Perform Before (B) PMCS just before operating the air
compressor unit.(2) Perform During (D) PMCS while operating the air
compressor unit.(3) Perform After (A) PMCS right after operating
the air compressor unit.(4) Perform Weekly ON) PMCS once each
week.
2-5. REPORTING REPAIRS.
All defects which the operator cannot fix must be reported on a
DA Form 2404, Equipment Inspection andMaintenance Worksheet,
immediately after completing PMCS. If a serious problem is found,
IMMEDIATELY report it toyour supervisor.
2-6. GENERAL PMCS PROCEDURES.
WARNING
Dry cleaning solvent, P-D-680, Is toxic and flammable. Always
wear protective goggles andgloves, and use only In a
well-ventilated area. Avoid contact with skin, eyes, and clothes,
and DONOT breathe vapors. DO NOT use near open flame or excessive
heat. The solvent’s flash point Is100°F-138°F (38°C-590C). If you
become dizzy while using cleaning solvent, Immediately get freshair
and medical help. If solvent contacts eyes, Immediately wash your
eyes and get medical aid.
a. Keep equipment clean. Dirt, oil, and debris may cover up a
serious problem. Clean as you work and asneeded. Use dry cleaning
solvent (Item 38, Appendix E) on all metal surfaces. Use
dishwashing compound (Item 13,Appendix E) and water on rubber,
plastic, and painted surfaces.
2-7
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TM 5-4310-451-14
2-6. GENERAL PMCS PROCEDURES (Con’t).
b. While performing specific PMCS procedures, Inspect the
following components:
(1) Bolts, Nuts, and Screws. Ensure that they are not loose,
missing, bent, or broken, Report looseor missing bolts, nuts, and
screws to Unit Maintenance.
(2) Welds. Inspect for gaps where parts are welded together.
Check for loose or chipped paint, rust,and cracks. Report bad welds
to Unit Maintenance.
(3) Electric Conduit, Wires, and Connectors. Inspect for cracked
or broken conduit insulation,bare wires, and loose or broken
connectors. Report loose connections and faulty wiring to Unit
Maintenance.
(4) Hoses, Lines, and Fittings. Inspect for wear, damage, and
leaks. Ensure that clamps andfittings are tight. Report any damage,
leaks, or loose fittings and clamps to Unit Maintenance.
c. Check that components are adequately lubricated in accordance
with Lubrication Instructions (seeChapter 3, Section I).
2-7. SPECIFIC PMCS PROCEDURES.
a. Operator/Crew PMCS are provided in Table 2-1. Always perform
PMCS in the order listed. Once it becomes ahabit, anything that is
not right can be spotted in a minute.
b. Before performing PMCS, read all the checks required for the
applicable Interval and prepare all the tools needed.Have several
clean rags (Item 35, Appendix E) handy. Perform ALL Inspections at
the applicable Interval.
c. If anything wrong is discovered through PMCS, perform the
appropriate troubleshooting task In Chapter 3, SectionII. If any
component or system is not serviceable, or if a given service does
not correct the problem, notify your supervisor.
d. The columns in Table 2-1 are defined as follows:(1) Item No.
Provides a logical sequence for PMCS to be performed and is used as
a source of item
numbers for the "TM ITEM NO." column when recording PMCS results
on DA Form 2404.(2) Interval. Specifies the interval at which PMCS
is to be performed.(3) Item to be Inspected. Lists the system and
common name of items that are to be inspected.
Included in this column are specific servicing, Inspection,
replacement, or adjustment procedures to befollowed.
NOTEThe terms “ready/available” and “mission-capable” refer to
the same status:Equipment is on hand and is able to perform its
combat missions (AR 700-138)
(4) Equipment is Not/Ready Available If: Explains when and why
the air compressor unit cannot be used.
2-8. LEAKAGE DEFINITIONS.
a. It is Important to know how fluid leakage affects the status
of the air compressor unit. Following aretypes/classes of leakage
an operator must know to determine whether the air compressor unit
is mission-capable. Learnthese leakage definitions. When In doubt,
notify your supervisor.
Leakage Definitions for Operator/Crew PMCS
Class I Seepage of fluid (as Indicated by wetness or
discoloration) not greatenough to form drops.
Class II Leakage of fluid great enough to form drops, but not
great enough tocause drops to drip from item being Inspected.
Class III Leakage of fluid great enough to form drops that fall
from the item beinginspected.
2-8
-
TM 5-4310-451-14
2-8. LEAKAGE DEFINITIONS (Con’t).
CAUTION
When operating with Class I or II leaks, check fluid levels In
addition to that required InPMCS. Parts without fluid will stop
working or may be damaged.
b. Equipment operation Is allowed with minor (Class I or II)
leakage. Fluid levels in an Item/system affectedwith such leakage
must be checked more frequently than required in PMCS. When In
doubt, notify your supervisor.
c. Report Class III leaks IMMEDIATELY to your supervisor.
Table 3-1. Operator/Crew Preventive Maintenance Checks and
Services (PMCS) (Con’t)
B-BEFORE D-DURING A-AFTER W-WEEKLY
INTERVALITEM TO BE INSPECTED EQUIPMENT IS NOT
ITEM B D A W PROCEDURE: CHECK FOR AND HAVE REPAIRED,
READY/AVAILABLE IFNO. FILLED, OR ADJUSTED AS NEEDED.
NOTE
Perform Weekly (W) as well as Before (B)PMCS If:
• You are the assigned operator but have notoperated the air
compressor unit since the lastWeekly.
• You are operating the air compressor unit for thefirst
time.
1 VEHICLE EXTERIOR• a. Check for fluid leakage or appearance of
fluid leak- Any Class III leaks are found.
age.• b. Visually check for damaged piping or hoses, and Piping
or hoses are leaking
loose, missing, or damaged parts or broken. Parts are missingor
damaged.
2 HANDBRAKE LEVER• Check for tension in cable when applied No
tension in cable.
3 TIRES• a Inspect tires for unusual wear or damage Tires have
damage which
could result in failure.• • b Visually check for evidence of low
air pressure.• • c Inspect wheels for cracks and other damage Wheel
is damaged or wheel
Check for signs of looseness or missing wheel nuts are loose or
missing.nuts.
2-9
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TM 5-4310-451-14
Table 2-1. Operator/Crew Preventive Maintenance Checks and
Services (PMCS) (Con’t).B-BEFORE D-DURING A-AFTER W-WEEKLY
INTERVALITEM TO BE INSPECTED EQUIPMENT IS NOT
ITEM B D A W PROCEDURE: CHECK FOR AND HAVE REPAIRED,
READY/AVAILABLE IFNO. FILLED, OR ADJUSTED AS NEEDED.
4 AIR FILTERSWARNING
If NBC exposure Is suspected, all engineair cleaner air filter
media should behandled by personnel wearing protectiveequipment.
Consult your NBC Officer orNBC NCO for appropriate handling
ordisposal procedures.
• Visually check air restriction Indicator. If indicatorshows a
red condition, clean air cleaner (see para-graph 3-6).
5 BATTERYWARNING
• Remove all Jewelry such as dog tags, rings,bracelets, etc. If
Jewelry or disconnected batteryground cable contacts battery
terminal, a directshort will result, causing serious Injury or
deathto personnel.
• Storage battery acid (electrolyte) Is extremelydangerous.
Always wear goggles and rubbergloves when performing battery checks
orInspections. Serious Injury to personnel willresult if battery
acid contacts skin or eyes.
• DO NOT perform storage battery checks orInspections while
smoking or near fire, flames,or sparks. Storage batteries may
explode,causing serious Injury or death to personnel.
• a Check electrolyte level in storage batteries Electrolyte
level is below topof plates.
• b Check storage batteries and storage batteries box Storage
battery or storagefor corrosion and obvious damage batteries box
corrosion or
damage is found. Storagebattery is missing or enginewill not
crank.
2-10
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TM 5-4310-451-14
Table 2-1. Operator/Crew Preventive Maintenance Checks and
Services (PMCS) (Con’t).
B-BEFORE D-DURING A-AFTER W-WEEKLY
INTERVALITEM TO BE INSPECTED EQUIPMENT IS NOT
ITEM B D A W PROCEDURE: CHECK FOR AND HAVE REPAIRED,
READY/AVAILABLE IFNO. FILLED, OR ADJUSTED AS NEEDED.
6 AIR COMPRESSOR OIL LEVELWARNING
Air compressor lubrication/cooling system Isunder pressure. DO
NOT remove drain plug orfiller plug from air compressor
lubrication/coolingsystem while under pressure or Injury
topersonnel may result.
• • Check air compressor oil level in sight tube. Oil must No
oil is present in sight tube.be present in sight tube when unit is
running.
7 ENGINE OIL LEVELNOTE
Air compressor unit must be level to perform thischeck.
• Check engine oil level on dipstick. Oil level should be Oil is
below "ADD" mark.between "ADD" and "FULL" marks.
8 DRIVEBELTS• a. Visually check for broken or missing belts.
Belts are broken or missing.• b. Press down on belts and measure
the deflection Belts deflect A in. (12.3 mm)
with rule or more. Belts are cracked or. deteriorated.
9 FUEL SYSTEM
• a. Visually inspect fuel system for signs of leakage. Any fuel
leakage is present.• b. Visually inspect fuel tank for damage. Fuel
tank damage which
could result in fuel leakage.• c. Check fuel level on fuel level
gage. Fuel tank is empty.
10 RADIATOR
• Check coolant level at tank. Coolant is below minimum
level.
11 ELECTRICAL
• Check electrical wires for looseness or damage. Wires are
loose or damaged.
2-11
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TM 5-4310-451-14
Table 2-1. Operator/Crew Preventive Maintenance Checks and
Services (PMCS) (Con’t).
B-BEFORE D-DURING A-AFTER W-WEEKLY
INTERVALITEM TO BE INSPECTED EQUIPMENT IS NOT
ITEM B D A W PROCEDURE: CHECK FOR AND HAVE REPAIRED,
READY/AVAILABLE IFNO. FILLED, OR ADJUSTED AS NEEDED.
12 FIRE EXTINGUISHERWARNING
Handle charged fire extinguisher cylinders withcare. DO NOT jar
or expose cylinder totemperatures above 140 °F (60 °C). Failure
tofollow this warning may cause an explosion,resulting In serious
Injury or death to personnel.
NOTERefer to TB 5-4200-200-10 for guidance on
fireextinguishers.
• Check for broken or missing seal. Check security of Seal is
broken or missing. mounting device Fire extinguisher is
missing.
13 EXHAUST SYSTEMWARNING
Before checking any part of exhaust system, allowexhaust system
to cool. Failure to follow thiswarning may result In serious
burns.
• Visually check exhaust system for signs of leaks, Exhaust
system has signs ofcracks, or breaks and loose or missing mounting
leaks, cracks, or breaks. clamps Mounting clamps are loose or
missing.
14 INSTRUMENTS AND GAGES
Check for proper indication and operation:• (1) Engine Oil
Pressure 40-60 psi Not within normal operating
(276-414 kPa) range or nonoperational.at 1050 rpm
• (2) Air CompressorDischargeTemperature 180°F (82°C) Not within
normal operating
normal operating range or nonoperational.pressure
2-12
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TM 5-4310-451-14
Table 2-1. Operator/Crew Preventive Maintenance Checks and
Services (PMCS) (Con’t).
B-BEFORE D-DURING A-AFTER W-WEEKLY
INTERVALITEM TO BE INSPECTED EQUIPMENT IS NOT
ITEM B D A W PROCEDURE: CHECK FOR AND HAVE REPAIRED,
READY/AVAILABLE IFNO. FILLED, OR ADJUSTED AS NEEDED.
14 INSTRUMENTS AND GAGES (Con’t)
• (3) Ammeter Should Indicate Not within normal
operating"charge" side range or nonoperational.
of meter• (4) Engine Coolant Not within normal operating
Temperature 160°F-180°F range or nonoperational.(71°C-82°C)
normal operatingtemperature
2-13
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TM 5-4310-451-14Section III. OPERATION UNDER USUAL
CONDITIONS
Paragraph PageNumber Paragraph Title Number
2-9 General
........................................................................................................................................................
2-142-10 Start Air Compressor Unit
............................................................................................................................
2-142-11 During
Operation..........................................................................................................................................
2-162-12 Stop Air Compressor Unit
............................................................................................................................
2-172-13 Couple Air Compressor Unit to Towing
Vehicle...........................................................................................
2-182-14 Tow Air Compressor
Unit.............................................................................................................................
2-182-15 Uncouple Air Compressor Unit from Towing Vehicle
..................................................................................
2-192-16 Operate Portable Fire
Extinguisher..............................................................................................................
2-20
2-9. GENERAL.
a. This section contains instructions for safely operating the
air compressor unit under usual conditions. Unusual operating
conditions are defined and described in Section IV of this
chapter.
b. Perform PMCS in Table 2-1 before operating the air compressor
unit.
2-10. START AIR COMPRESSOR UNIT.
NOTEEnsure that air compressor unit Is parked on level ground
prior to starting engine.
a. Set handbrake lever (10).NOTE
Perform step b only at Initial startup.b. Open service line
(1).c. Turn cold start valve (6) to START position.d. Move master
battery switch (8) to ON position.e. Turn ON/OFF engine switch (2)
to ON position.f. Simultaneously push engine start button (5) and
engine override button (7). Release engine start button as
soon as engine starts and release engine override button as soon
as oil pressure reaches 20 psi (138 kPa) on engine oilpressure gage
(4).
WARNINGUse extreme caution when using ether. It Is an extremely
volatile gas with combustiontemperature lower than that of
vaporized diesel fuel. Too much ether can cause an
uncontrolledexplosion and may result in Injury or death to
personnel and severe damage to engine.
g. If engine does not start, press lever (9) and release ether
starting aid. Repeat step f.
2-14
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TM 5-4310-451-14
2-10. START AIR COMPRESSOR UNIT (Con’t).
h. When engine coolant temperature reaches 1300F (540C) on
engine coolant temperature gage (3), movecold start valve (6) to
RUN position.
i. When air compressor unit is running normally and before using
air compressor, close and secure all doors.J. Close service line if
initial startup.
TA704690
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TM 5-4310-451-14
2-11. DURING OPERATION.
CAUTION
• Care must be taken to prevent air In fuel system. Never allow
fuel tank to run dry. Air In fuelsystem will cause engine
powerloss, rough running, or engine to stall and not restart.
• Ensure that all doors are closed for proper cooling and noise
suppression.a. General.
(1) Perform all During (D) PMCS.(2) Become familiar with the
normal operation of the air compressor unit and with readings or
Indicators.
Damage to equipment, extensive repairs, and downtime can be
avoided by an alert operator who car detect problems Inearly stages
and help Unit Maintenance correct them before they become
serious.
b. Discharge Pressure Operation .NOTE
Perform this adjustment If air compressor does not discharge at
100 psi (690 kPa) duringoperation.
(1) While operating air compressor unit, turnpressure regulating
valve (1) clockwise to Increase orcounterclockwise to decrease
discharge pressure.
(2) Repeat step 1 until air pressure gagereads 100 psi (689.5
kPa).
2-16
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TM 5-4310-451-14
2-12. STOP AIR COMPRESSOR UNIT.
CAUTIONAllow engine to Idle approximately five minutes without a
load to allow It to cool down beforeshutdown. Failure to follow
this caution may result in damage to engine.
a. Close two service valves (1).
b. Turn ON/OFF engine switch (2) to OFF position.
c. Turn master battery switch (3) to OFF position.
2-17
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TM 5-4310-451-14
2-13. COUPLE AIR COMPRESSOR UNIT TO TOWING VEHICLE.
WARNINGAll personnel must stand clear of towing vehicle and air
compressor unit during couplingoperation. Failure to follow this
warning may result In serious Injury or death.
CAUTIONHave ground guide direct you during backing operations.
Damage to equipment may result ifcaution Is not followed.
a. Remove pintle lockpin (1) and open pintle (2).b. Aline towing
vehicle with air compressor unit and slowly back towing vehicle
until pintle (2) is positioned in
drawbar ring (3).c. Close pintle (2) and install pintle lockpin
(1).d. Release air compressor unit handbrake lever.e. Cross safety
chains (4) under drawbar ring (3) and attach to towing vehicle.
2-14. TOW AIR COMPRESSOR UNIT.
a. General.Refer to FM 21-305 for further information on proper
driving practices.
b. Driving.(1) Keep In mind overall length of towing vehicle and
air compressor unit when passing other vehicles, turning,
and backing.(2) Always tow air compressor unit at speeds less
that 15 mi/h (24 km/h).(3) When turning corners, remember that air
compressor unit wheels turn inside turning radius of towing
vehicle.
TA704693
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TM 5-4310-451-14
2-14. TOW AIR COMPRESSOR UNIT (Con’t)
(4) When making a right-hand turn at an intersection, drive
towing vehicle about halfway into intersection andthen cut sharply
to right. This will allow for shorter tuning radius of air
compressor unit and will keep it off the curb.
(5) Avoid backing whenever possible.(6) If backing is
unavoidable, have a ground guide direct you while backing. Maneuver
In a manner that will not
exceed freedom of rotation of drawbar ring within d6cpling
device, in either horizontal or vertical planes.(7) Air compressor
unit does not have service brakes; therefore, applying brakes of
towing vehicle does not
immediately affect the air compressor unit. Apply-towing vehicle
brakes gradually and smoothly, and allow for adequatedistance to
stop.
c. Parking.(1) Park air compressor unit on level area, if
possible. If not possible, park across grade so that air
compressor
unit will not roll downhill.(2) Park air compressor unit with
front wheels in straight ahead position and chock all four
wheels.(3) When parking for extended periods, set handbrake levers
on both towing vehicle and air compressor unit.(4) Park air
compressor unit so that wind, if any, will carry exhaust fumes away
from personnel and air
compressor air inlet openings. Also, park so that air compressor
unit will not be exposed to excessive dust from work site.
2-15. UNCOUPLE AIR COMPRESSOR UNIT FROM TOWING VEHICLE.
WARNING
All personnel must stand clear of towing vehicle and air
compressor unit during uncouplingoperation. Failure to follow this
warning may result In serious Injury or death.
a. Disconnect safety chains (4) from towing vehicle and stow on
air compressor unit.
b. Remove pintle lockpin (1) and open pintle (2).
c. Apply air compressor unit handbrake lever. Lift drawbar ring
(3) from pintle (2).
d. Move towing vehicle away from air compressor unit.
2-19
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TM 5-4310-451-14
2-16. OPERATE PORTABLE FIRE EXTINGUISHER.
WARNING
Handle charged fire extinguisher cylinders with care. DO NOT Jar
or expose cylinder totemperatures above 140°F (60°C). Failure to
follow this warning may cause an explosion, resultingin serious
Injury or death to personnel.Portable fire extinguisher Is a dry
chemical fire extinguisher. DO NOT use on trash, wood, orpaper
fires. Dry chemical fire extinguishers are not effective on these
fires.
a. Remove fire extinguisher (1) from storage
b. Break seal (3) on fire extinguisher (1).c. Hold fire
extinguisher (1) level.d. Take fire extinguisher (1) as close
as
possible to fire and point directly at base of flames.e. Press
down on button (4) to release fire
extinguisher (1) contents.f. Tag fire extinguisher (1) with
word
EMPTY.
2-20
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TM 5-4310-451-14
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
Paragraph PageNumber Paragraph Title Number
2-17 General
........................................................................................................................................................
2-212-18 Operation in Dusty or Sandy
Areas..............................................................................................................
2-212-19 Operation in Extreme Heat
..........................................................................................................................
2-222-20 Operation in Areas of High Humidity, Heavy Rain, or
Saltwater
..................................................................
2-222-21 Operation in Extreme Cold or Snow
............................................................................................................
2-222-22 Operation at High
Altitudes..........................................................................................................................
2-262-23
Fording.........................................................................................................................................................
2-262-24 Emergency Engine Stopping
.......................................................................................................................
2-27
2-17. GENERAL.
a. This section contains Instructions for safely operating the
air compressor unit under unusual conditions.In additional to
normal preventive maintenance, special care must be taken to keep
air compressor unit operational inextreme temperatures and other
environmental conditions.
b. Refer to FM 21-305 and FM 55-30 for information on special
driving instructions under unusual conditions.c. Refer to FM 9-207
for Information on operation in cold weather.d. Refer to FM 90-3
for information on operation in extreme heat, dusty, or sandy
conditions.
2-18. OPERATION IN DUSTY OR SANDY AREAS.a. In dusty or sandy
areas, guard against sand or dust getting Into air compressor
unit.b. Clean, inspect, and lubricate air compressor unit more
often In sandy or dusty areas.c. Clean all filler caps before
servicing any lubricant. Ensure that caps are tightened securely
after servicing.d. Keep governor control rods clean and free of
dust or sand. Wipe off any excess oil or grease spilled on air
compressor unit as this will attract and hold dust and sand.
WARNINGCompressed air used for cleaning or drying purposes, or
for clearing restrictions, should neverexceed 30 psi (207 kPa).
Wear protective clothing (goggles/shield, gloves, etc.) and use
caution toavoid Injury to personnel.
e. Clean radiator core with compressed air daily or more often
if needed. Clear dust and sand out oppositeway it enters
radiator.
f. Ensure that oil cooler fins are clear and free of dust and
sand buildup. Keep fan belts adjusted to propertension.
g. Ensure that fan shroud is tight against radiator to prevent
recirculation of air. Ensue that radiator cap issecure.
h. Clean or change engine and air compressor air cleaners, oil
filters, and fuel filters as needed.i. If engine temperature rises
above 200°F (93 °C), remove load on air compressor unit and allow
engine to
Idle until normal operating temperature is obtained.
2-21
-
TM 5-4310-451-142-19. OPERATION IN EXTREME HEAT.
a. Refer to Chapter 3, Section I for proper lubrication during
extreme heat conditions.b. Shelter or cover air compressor unit
with canvas covers, if available.c. Check oil levels In engine and
oil separator tank often.d. Frequently check cooling fan belts for
wear and proper tension.e. Frequently check air compressor
discharge temperature gage.f. Ensure that cooling fins and cooling
fan are kept clean and unobstructed.
2-20. OPERATION IN AREAS OF HIGH HUMIDITY, HEAVY RAIN, OR
SALTWATER.
a. Air compressor units, Inactive for long periods of time In
hot and humid weather, are subject to rapid rustingand accumulation
of fungus. Frequently Inspect, clean, and lubricate to prevent
deterioration of painted surfaces. Refer toLubrication Instructions
(see Chapter 3, Section I).
b. Dampness Increases chances of corrosion. Inspect all surfaces
and electrical connections for signs ofcorrosion.
c. Check twice daily for water In oil of both engine and air
compressor.
2-21. OPERATION IN EXTREME COLD OR SNOW.
a. General.
(1) Refer to Lubrication Instructions (see Chapter 3, Section I)
for proper lubricants to use In extreme cold.(2) Care must be taken
when handling cables. Extreme cold weather can cause insulation
material on
electrical wire to crack, causing short circuits.(3) When
parking for any period of time, park in sheltered area out of wind
and clean off any buildup of snow or
ice. Place footing of planks or brush under tires to prevent
tires from freezing to ground. Ensure that tires are
properlyinflated (see paragraph 1-11). Underinflated tires will
freeze, resulting in flat spots.
(4) Use care when placing air compressor unit in motion after
shutdown. Thickened lubricants may causefailure of components. Free
tires frozen to ground with care.
(5) If available, use canvas covers to shield air compressor
unit. Keep cover ends off ground to keep themfrom freezing to
ground.
(6) Ensure that radiator fins are clear and free of snow
buildup. Keep fan belts adjusted to proper tension.(7) At
temperatures below -4°F (-20°C), engine must be warmed up before
starting operations.
2-22
-
TM 5-4310-451-14
2-21. OPERATION IN EXTREME COLD OR SNOW (Con’t).
b. Jump Starting Engine with Jumper Cables.
WARNING• Remove all jewelry such as dog tags, rings, bracelets,
etc. If Jewelry or disconnected battery
ground cable contacts battery terminal, a direct short will
result. Failure to follow properdisconnection procedures will
result In serious Injury or death to personnel or equipment
damage.
• Battery acid (electrolyte) Is extremely dangerous. Always wear
goggles and rubber gloves whenperforming battery checks or
Inspections. Serious Injury to personnel will result If battery
acidcontacts skin or eyes.
• DO NOT perform battery system checks or Inspections while
smoking or near fire, flames, orsparks. Batteries may explode,
causing serious Injury or death to personnel.
• Batteries generate hydrogen, a highly explosive gas. To
prevent sparks from igniting batterygases, DO NOT connect negative
(-) Jumper cable to negative (-) terminal on weak battery.
Failureto follow this warning may result In serious Injury or death
to personnel.
NOTE
• This task should be performed with assistance of Unit
Maintenance.
• Jump start only with vehicle having 24-volt electrical system
and negative ground. Sourcebattery/batteries must be of comparable
size.
(1) Remove 12 vent caps (2) from two batteries (1).
(2) Check fluid level in two batteries (1). If low, bring to
proper level.
2-23
-
TM 5-4310-451-14
2-21. OPERATION IN EXTREME COLD OR SNOW (Con’t).
WARNINGDO NOT attempt to Jump start If battery fluid appears
frozen. Bring temperature of batteries up to40 F (4 0C) before
attempting to Jump start. Failure to follow this warning may cause
anexplosion, resulting In serious Injury to personnel.
(3) Cover 12 open cells (3) of two batteries (1) with clean
dampened cloths.
WARNINGDO NOT attempt to jump start with two 12-volt passenger
car batteries connected In series. Both12-volt batteries must have
an ampere rating equivalent to or larger than 24-volt batteries
suppliedwith air compressor unit. If batteries overheat, Injury to
personnel will result.
(4) Position starting vehicle next to air compressor unit. Do
not permit metal-to-metal contact between aircompressor unit and
starting vehicle.
(5) Set handbrake lever on air compressor unit and parking brake
on starting vehicle.(6) Place starting vehicle in neutral or park
and turn off all nonessential accessory electrical loads.
Keep engine running.
WARNING
• Use only Jumper cables that are clean, In good condition, and
are heavy enough to handle startingcurrent. A shorted or melted
wire will result In Injury to personnel.
• Avoid contact between Jumper cable terminal clamp and any
metallic portion of either aircompressor unit or starting vehicle.
A direct short will result In Injury to personnel.
(7) Connect red positive (+) cable to positive (+) terminal of
starting vehicle battery. If starting vehicle Isequipped with two
12-volt batteries connected in series, connect jumper cable to
positive (+) terminal of ungroundedbattery.
TA704697
2-24
-
TM 5-4310-451-14
2-21. OPERATION IN EXTREME COLD OR SNOW (Con’t).
(8) Connect other end of red positive (+) cable to positive (+)
terminal of ungrounded air compressor unitbattery.
(9) Connect black negative (-) cable to grounded negative
terminal of starting vehicle battery. If starting vehicleis
equipped with two 12-volt batteries connected in series, connect
jumper cable to negative (-) terminal of groundedbattery.
(10) Connect other end of black negative (-) cable to air
compressor unit frame.
(11) Start air compressor unit (see paragraph 2-10). Avoid
prolonged cranking. If necessary, check jumpercables, terminals,
and batteries frequently for overheating. If hot to touch, wait for
item to cool before attempting to startagain.
(12) Allow air compressor unit engine to warm up. When engine Is
warm and operating smoothly at normal idlerpm, disconnect black
negative (-) cable first from air compressor unit frame and then
from starting vehicle battery.
(13) Disconnect red positive (+) cable first from air compressor
unit battery and then from starting vehicle battery.
2-25
-
TM 5-4310-451-14
2-21. OPERATION IN EXTREME COLD OR SNOW (Con’t).
WARNINGBattery acid (electrolyte) Is extremely dangerous. Always
wear goggles and rubber gloves whenperforming battery checks or
Inspections. Serious Injury to personnel will result If battery
acidcontacts skin or eyes.
(14) Remove and carefully dispose of dampened cloths from 12
open cells (3).(15) Install 12 vent caps (2) on two batteries
(1).
2-22. OPERATION AT HIGH ALTITUDES.
a. Due to thinner air at higher altitudes, the air compressor
unit will operate at reduced capacity (i.e., the higherthe
altitude, the lower the capacity). Engine will produce less power
and air compressor will have less air to compress. Itwill take
longer to arrive at operating pressure and it will be slower to
replenish.
b. Frequently check discharge temperature gage. If air
compressor unit overheats, stop use of all tools andallow air
compressor unit to run, unloaded, until it cools down to a more
acceptable operating temperature, 185°F (85 °C).
2-23. FORDING.
CAUTION
To prevent severe damage and contamination of Internal
components, DO NOT ford this aircompressor unit in water with depth
greater than 30 In. (76 cm).
a. Before Fording.(1) Refer to towing vehicle operating
instructions for information on fording. Towing vehicle
instructions are
also applicable to the the air compressor unit.(2) Ensure that
all filler caps, plugs, and valves are closed and secure.(3) Do not
attempt to ford an area that has a swift current, high banks, or
overhanging trees or boulders that
appear to be in danger of toppling.TA704699
2-26
-
TM 5-4310-451-14
2-23. FORDING (Con’t).
b. During Fording.(1) At safe operating speed, carefully move
across area to be forded.(2) Do not stop or attempt to back up.
c. After Fording.(1) Check oil levels of engine and air
compressor, and check for water contamination. If oil levels are
too high, water hasentered and oil must be replaced.(2) Wipe dry
and/or allow time to dry all electrical components and wires.
2-24. EMERGENCY ENGINE STOPPING.
CAUTIONEmergency engine shutdown should only be used in case of
emergency. Use of emergencyengine shutdown can cause oil to be
sucked past oil seals and Into blower housing.
a. Pull out emergency stop control (1) fully.
2-27
-
TM 5-4310-451-14
2-24. EMERGENCY ENGINE STOPPING (Con’t).
CAUTION
DO NOT attempt to start engine again until cause of malfunction
has been found and corrected.
b. Reset air shutoff valve (3) on blower inlet housing (2) by
turning lever 450 toward ground.c. Push in emergency stop control
(1) fully.
2-28
-
TM 5-4310-451-14
CHAPTER 3OPERATOR MAINTENANCE
Section I. LUBRICATION INSTRUCTIONS
Paragraph PageNumber Paragraph Title Number
3-1 General
.........................................................................................................................................................
3-13-2 Specific Lubrication Instructions
...................................................................................................................
3-1
Lubrication
Chart...........................................................................................................................................
3-2
3-1. GENERAL
NOTE
These Instructions are MANDATORY.a. The air compressor unit must
receive lubrication at recommended intervals in order to be
mission-ready at
all times.
b. The KEY lists lubricants to be used in all temperature ranges
and shows the intervals.
c. The Lubrication Chart shows lubrication points, names items
to be lubricated, the required lubricants, andthe recommended
interval for lubrication. Any special lubricating instructions
required for specific components arecontained in the NOTES section
of the chart.
d. Recommended intervals are based on normal conditions of
operation, temperature, and humidity. Whenoperating under extreme
conditions, lubricants should always be changed more frequently.
When in doubt, notify yoursupervisor.
3-2. SPECIFIC LUBRICATION INSTRUCTIONS.
a. Keep all lubricants in closed containers and store in clean,
dry place away from extreme heat. Keepcontainer covers clean and do
not allow dust, dirt, or other foreign material to mix with
lubricants. Keep all lubricationequipment clean and ready for
use.
b. Maintain a record of lubrication performed and report any
problems noted during lubrication. Refer to DAPam 738-750 for
maintenance forms and procedures to record and report any
findings.
c. Keep all external parts of equipment not requiring
lubrication free of lubricants. After lubrication, wipe offexcess
oil or grease to prevent accumulation of foreign matter.
d. Refer to FM 9-207 for lubrication instructions in cold
weather.
e. After operation in muddy, sandy, or dusty conditions, clean
and inspect all points of lubrication forcontaminated lubricants.
Change lubricants as required.
3-1
-
TM 5-4310-451-14
LUBRICATION CHART
COMPRESSOR, AIR: ROTARY SCREW, 750 CFM,100 PSI, WHEEL-MOUNTED,
DED
SULLAIR MODEL 750 DP(NSN 4310-01-053-3891)
Intervals (on-condition or hard time) and related man-hour times
are based on normal operation. The man-hour time specified is the
time you need to do al servicesprescribed for a particular
interval. De-crease theintervals if your lubricants are
contaminated, or If you areoperating equipment under adverse
conditions, includinglonger-than-usual operating hours. The
intervals may beextended during periods of low activity. If
extended,adequate preservation precautions must be taken.
Dotted leader lines indicate lubrication Is required or
bothsides of the equipment.
WARNING
Dry cleaning solvent, P-D-680, Is toxicand flammable. Always
wearprotective goggles and gloves, anduse only in a
well-ventilated
area. Avoid contact with skin, eyes,and clothes, and DO NOT
breathevapors. DO NOT use near open flameor excessive heat. The
solvent’sflash point Is 100°F-138°F (38°C-59°C). If you become
dizzy whileusing cleaning solvent, Immediatelyget fresh air and
medical help. Ifsolvent contacts eyes, Immediatelywash your eyes
and get medical aid.
Clean all fittings and area around lubrication points withdry
cleaning solvent (Item 38, Appendix E) or equivalentbefore
lubricating equipment. After lubrication, wipe offexcess oil or
grease to prevent accumulation of foreignmatter.
The lowest level of maintenance authorized to lubricate apoint
is indicated in parentheses by use of the following:(C)
Operator/Crew; or (O) Organizational Maintenance.
3-2
-
TM 5-4310-451-14
LUBRICANT • INTERVAL INTERVAL • LUBRICANT
TOTAL MAN-HOURS* TOTAL MAN-HOURS*INTERVAL MAN-HOUR INTERVAL
MAN-HOUR
D 0.1 10 hr 0.1S 0.5 100 hr 1.5A 1.5 500 hr 0.5
4000 hr 0.5
* The man-hour time specified is the time you need to do all
services prescribed for a particular interval.TA704702
3-3
-
TM 5-4310-451-14
3-4
-
TM 5-4310-451-14
3-5
-
TM 5-4310-451-14
NOTES:
1. ARMY OIL ANALYSIS PROGRAM (AOAP).For Active Army units,
obtain samples from engine every50 hours of operation or 90 days
(whichever comes first).Reserve and National Guard activities will
use 50 hoursor 180 days as the prescribed sample intervals.
Reserveand National Guard equipment in frequent use duringactive
training period will adhere to the schedule forActive Army units.
As a minimum, one sample fromeach item of equipment will be
submitted for each units’two week active training period. Send
these samples tothe nearest AOAP laboratory. Refer to TB 43-0120
forsampling instructions. When or if AOAP laboratorysupport is
unavailable, hard time intervals will apply.
NOTE
• DO NOT hold oil samples. Submitoil samples as soon as they
havebeen taken.
• Seasonal oil changes will bemade due to expectedtemperatures
(see KEY).
2. FOR OPERATION OF EQUIPMENT IN PRO-TRACTED COLD TEMPERATURES
BELOW -15°F (-26°C). Remove lubricants prescribed in Key
fortemperatures above -15°F (-26°C). Relubricate withlubricants
specified in Key for temperatures below -15°F(-26°C). If OEA
lubricant is required to meet thetemperature ranges prescribed in
the Key, OEA lubricantis to be used in place of OE/HDO-10 lubricant
for alltemperature ranges where OE/ HDO-10 is specified inthe
Key.
3. OIL CAN POINTS. Each 50 hours, lubricateside door hinges,
front door hinges, hand brakeassembly, and linkage with OE/HDO.
4. ENGINE OIL LEVEL CHECK. Engine oil levelshould be between
"HIGH" and "LOW" marks on dipstick(allow to sit five minutes before
checking).
5. ENGINE. Oil is to be changed each time anengine oil change is
directed by AOAP laboratory. WhenAOAP laboratory support is not
available, change oileach 100 hours. Drain when oil is warm.
6. ENGINE OIL FILTER . Filter is to be replacedeach time an
engine oil change is directed by AOAPlaboratory. After installing
new filter element, fillcrankcase and operate engine five minutes.
Check forleaks, check crankcase oil level, and bring to full
mark.When AOAP laboratory support is not available, installnew
filter element each 100 hours.
7. OIL SEPARATOR LEVEL. Each 10 hours,check level. Maintain
level to full mark with OE/HDO.
8. OIL SEPARATOR. Each 500 hours, change oil.Drain when
lubricant is warm. After refill, operate for fiveminutes, check for
leaks, and bring to full mark.
9. AIR COMPRESSOR OIL FILTER. Each 100hours, remove filter
element, clean housing, and installnew filter element. After
installing new filter element, fillair compressor, operate for five
minutes, check for leaks,and bring to full mark.
WARNING
DO NOT attempt to clean the elementor reuse the element because
of itsclean appearance. Metal salts aredeposited on the element as
the oil isseparated from the air. Pollution ofmetal salts on the
element will lowerthe flash point and can cause a fire inthe
separator. Destroy used elementto pre- vent accidental reuse.
10. OIL SEPARATOR ELEMENT. Each 4000hours, replace oil separator
element.
11. WHEEL BEARINGS. Annually remove, clean,and pack wheel
bearings with GAA (see TM 9-214).
3-6
-
TM 5-4310-451-14
Section II. OPERATOR/CREW TROUBLESHOOTING
Paragraph PageNumber Paragraph Title Number
3-3
General........................................................................................................................
3-73-4 Explanation of
Columns...............................................................................................
3-73-5 Troubleshooting Symptom
Index.................................................................................
3-8Table 3-1 Operator/Crew Troubleshooting
..................................................................................
3-8
3-3. GENERAL.a. This section provides information for
identifying and correcting malfunctions which may develop while
operating your air compressor unit.
b. The Troubleshooting Symptom Index in paragraph 3-5 lists
common malfunctions which may occur andrefers you to the proper
page in Table 3-1 for a troubleshooting procedure.
c. If you are unsure of the location of an item mentioned in
troubleshooting, refer to paragraph 1-7 or to themaintenance task
where the item is replaced.
d. Before performing troubleshooting, read and follow all safety
instructions found in the warning summary atthe front of this
manual.
e. This section cannot list all malfunctions that may occur, nor
all tests or inspections and corrective actions. Ifa malfunction is
not listed, or is not corrected by the listed corrective actions,
notify your supervisor.
f. When troubleshooting a malfunction:
(1) Locate the symptom or symptoms in paragraph 3-5 that best
describe the malfunction.
(2) Turn to the page in Table 3-1 where the troubleshooting
procedures for the malfunction in questionare described. Headings
at the top of each page show how e